Law / My grandparents were born in Poland. Question about Polish Heritage and Potential Citizenship [3]

Hello, everyone. I've just a simple question regarding whether or not I would qualify for Polish citizenship by descent some time in the future. The reason I'm asking is because some different sources I've read conflict and give different results. Here's the important information:

Me: Born in Fox Lake, Illinois, USA 1999

My Mother: Born in Hobart, Indiana, USA 1964

My Grandfather: Born in Tarnów, Poland, 1928
Relocated to Germany for mining during WWII
Emigrated to Hobart, Indiana, USA 1950
Served in US Army as medic, 1951-1953

My Grandmother: Born in Poland
Lived in Post-WW2 Poland
Emigrated to Hobart, Indiana USA, year unknown
First met my grandfather in USA, some time 1950-1952

I don't know the most about my grandmother, but I may be able to get more information soon. This should suffice for now, though. Thanks in advance!